ACCORDING TO THE PASSAGE, IT IS BELIEVED THAT THE LARGEST EXTIA. 6...

80. - DAP AN VA DE THI HOC SINH GIOI MON ANH VAN LOP 10 SO GD DT DAK NONG 80. - DAP AN VA DE THI HOC SINH GIOI MON ANH VAN LOP 10 SO GD DT DAK NONG
DAP AN VA DE THI HOC SINH GIOI MON ANH VAN LOP 10 SO GD DT DAK NONG

80. According to the passage, it is believed that the largest exti

A. 65 million years ago

B. 250 million years ago

C. 225 million years ago

D. 26 million years ago

B. WRITTEN TESTS (60PTS)

VII. OPEN CLOZE TESTS (20PTS)

OPEN CLOZE TEST 1

Read the test and fill in the missing words.

Blood is indeed (81) ______ the news, for on the heels of that announcement comes a report of

tests carried (82) _________ in the United States and Japan on artificial blood. After an accident, time is

crucial for a person suffering (83)________ extensive blood loss, and a transfusion of real blood must

often (84) ______preceded (85) _________ a time-consuming test for blood type. Plasma does not

require such a test but, because it can carry little oxygen it is not a wholly satisfactory substitute.

Perfluorocarbons appear to offer an answer. They are utilized in combination (86) _____ and emulsion

called Fluosol-DA, (87) _________ provides a number of additional advantages over real blood. These

include the absence of need for blood tests, (88) _______ fact that it can be frozen for as (89) _______ as

two years, its elimination eventually as a gas through the lungs, and the impossibility of its transmitting

such problems (90) _______ hepatitis.

thichtienganh.com

OPEN CLOZE TEST 2

Many of us are still unaware (91)_________or are indifferent to the need to preserve rare species.

Some

people

argue

that

species

have (92)_________dying

out

since

life

began.

"So (93)_________ should we worry about them now?" (94)_________ ask. They calmly believe that

others would take their place. What these people (95)_________not realize is that it

will (96)_________ millions of years before a set of species is evolved to replace (97)_________ we are

rapidly losing. These species are (98)_________national heritage. We should not let (99)_________die

off. They (100)_________ be preserved for our descendants.

VIII. WORD FORM (10PTS)

Give the correct form of the words in brackets.