HE WORKED VERY HARD ……… ..HE PASSED THED. D.

89. - BAI TAP TRAC NGHIEM TONG HOP A9 89. - BAI TAP TRAC NGHIEM TONG HOP A9
BAI TAP TRAC NGHIEM TONG HOP A9

89. He worked very hard ……… ..he passed the

d.

exam easily.

exchanged.

a. and b. so c. because

d. but