问题
You __________ buy a gift, but you can if you want to.
A:must
B:mustn’t
C:have to
D:don’t have to
B:mustn’t
C:have to
D:don’t have to
正确答案是：
同类题型
Cars moved very slowly in the 1930s,but they _________ faster than in the 1920s.
How long will the summer English courses —For six weeks.
Is that _____________ new bike, Tom–No, I lent _________ to Mike half an hour ago.
Mothertold Jim to wD.having turned
He ________ a long pole in the center of the field, and on the top of it I hung the lamp.