By the time Dave reached the small boat, a thick white fog _______ over the surface of the water.
| A．spread | B．has spread |
| C．had spread | D．was spreading |
Allen， shall we go to the bookstore this afternoon？
I'm sorry， David， but I ______________meet my cousin at the train station．（ ）
A．have toB．canC．mayD．could
"My People， My Country" is __________movie I've ever seen．（ ）
A．more educationalB．the most educational
C．educationalD．less educational
In Chinese families， people won't start dinner ___________the elders take their seats．（ ）
A．afterB．whenC．becauseD．until
Teachers expect all their students ___________progress day by day．（ ）
A．to makeB．makeC．to takeD．take
Is this hat_______________？
No， the red one is_________．（ ）
A．Lucy's； herB．Lucy； her
C．Lucy's； hersD．Lucy； hers