- Why didn't you try your best to get on the subway?
- I tried to, but it started moving_______ I could get on it.
| A．before | B．after | C．since | D．if |
Nobody ________ what the future will be like.
| A．know | B．to know | C． knows | D．knowing |
I really don’t know __________.
| A．how can I do | B．what I should do | C． what should I do | D．how should I do |
The apple is too big. Why don’t you ________ first?
| A．cut up it | B．cut it up | C．cut it down | D．cut them up |
His father promised _________ him to visit the museum.
| A．to take | B．take | C． taking | D．takes |
We’ll go camping if it ________ tomorrow.
| A．won’t rain | B．doesn’t rain | C．didn’t rain | D．isn’t raining |