I.单项选择
1. In our class __________of the students are girls.
A. three fifths B. three fifth C. third five D. third fifth
2. Oh，the milk _________strange, do you think it’s OK to drink?
A. was tasted B. tasted C. is tasting D. tastes
3. It’s hard to keep the house ________with three kids.
A. cleaning B. to clean C. cleaned D. clean
4. Don’t leave until he _______back.
A. have come B. comes C. will come D. came
5. —Could you tell us ________?
—About two weeks.
A. how often are we going to be away
B. how often we are going to be away
C. how long are we going to be away
D. how long we are going to be
