I CAN’T FIND MY BOOK ANYWHERE. I ……. HAVE LEFT IT ON THE TRAIN. I...

28.

I can’t find my book anywhere. I ……. have left it on the train. I am not sure.

A.

Must

B.

needn’t

C.

should

D.

might

V. Fill in each numbered blank with one suitable word or phrase. Nearly 200 of the 1500 native plant species in Hawaii are at risk of going extinct in the near futurebecause they have been (29) _____ to such low numbers. Approximately 90 percent of Hawaii's plants are foundnowhere else in the world but they are (30) _____ by alien invasive species such as feral goats, pigs, rodents andnon- (31) _____ plants.The Hawaii Rare Plant Restoration Group is striving to (32) _____ the extinction of the 182 rare Hawaiian plants with fewer than 50 individuals remaining in the (33) _____. Since 1990, (34) _____ a result of their 'Plant Extinction Prevention Program', sixteen species have been brought into (35) _____ and three species have been reintroduced. Invasive weeds have been removed in key areas and fencing put up in order to (36) _ plants in the wild.