We can't pass the driving test.........you keep calm. A. unless B. when C. because D. if 2. The variety of all forms of life, from genes to species, through to the broad scale of ecosystems is called____________. A. biologist B. biodiversity C. biology D. biological 3. My parents have devoted their life to their..........all what they do is for their children A. season B. offspring C. friend D. mate 4. Mai advised that........weight to be more attractive A. I should lose B. me losing C. I lose D. me lose 5. Mr Nam gave me a lot of................advice about learning English. A. valueless B. valued C. Valuable D. value 6. If I had a motorbike, I …………………home immediately. A. would go B. would have gone C. will go D. go 7. What..........if all the forests are destroyed ? A. happens B. happened C. would happen D. will happen 8. Although there were a lot of difficulties, they......to send their children to school and college. A. kept B. managed C. enjoyed D. resulted 9. Workers contributed........the development of industrial zones A. for B. to C. of D. on