IV. Give the correct tense or form of the verbs in brackets.
1. She (work) _____________ as a fashion designer since she left the college.
2. Look! The bus (come) _____________
3. Jane(send)_____________ me a lot of letters last year,
4. If we pollute the water, we (not have) ____________ fresh water to use.
5. It is necessary (protect)_____________ forests.
6. You should learn how (keep)__________ the environment clean.
7. That bridge (build)___________in 1960.
8. What would you do if you (see)___________a UFO?
V. Use the words given in brackets to form a word that fits in the space.
1. If at first you don’t ________, try again. (success)
2. My children are very ________ about their summer vacation. (excite)
3. Butter and cheese are milk__________ (produce)
4. She’s so busy with ________ activities that she has no time for entertainment. (society)
5. Mai had an_______ holiday in Nha Trang last year. (enjoy)
6. Tet is the most important________ in Viet Nam. (celebrate)