— ? —She’s watching TV at home.
| A．How is Mary | B．What does Mary do |
| C．What is Mary doing | D．How is it going |
They were talking about the persons and things _______ they saw in the factory.
| A．which | B．that |
| C．what | D．they |
Not only the students but also their teacher_______ the Great Wall before.
| A．have been to | B．has been to |
| C．has gone to | D．went |
It is impossible for ______ little children to do ______ much work within 20 minutes.
| A．so, so | B．so, such |
| C．such, so | D．such , such |
He has spent as much time as he has _______ English in the morning.
| A．to read | B．to reading |
| C．read | D．reading |
We're not sure if it _______ tomorrow. If it _______, we won't go hiking.
| A．will rain; rains | B．will rain; will rain |
| C．rains; rains | D．rains; will rain |