21. ---It looks heavy. Can I give you a hand?
---_______.
| A．No, thanks | B．Yes, my pleasure | C．No, never mind | D．Yes, I do |
When doing your history homework on the Civil War by typing in details to Google, a list of related books will ______ .
| A．come on | B．come up | C．come down | D．come across |
He _______ to go to Tsinghua University to study after graduating from high school, so he is working very hard.
| A．demands | B．defends | C．desires | D．designs |
The thief went into the house at midnight, only ______ by the policemen hiding there.
| A．to catch | B．catching | C．to be caught | D．caught |
. It is because English is being widely used at present _______.
| A．why we learn it hard | B．that we learn it hard |
| C．which we must learn | D．when we should learn |
Mum has always made me ________ my skin problem and encouraged me to use the cream.
| A．aware of | B．compared to | C．familiar with | D．accustomed to |