23．We still remember once__________round the famous tower when we were young.
| A．having taken | B．to be taken | C．having been taken | D．to have taken |
Some doctors were sent to the front where medical workers were __________.
A. in great need B in desperate need of C needed great D needed in
---Have you heard the latest news?
---No, What __________?
| A．is it | B．is there | C．are they | D．are those |
— Oh, it’s you. I__________ you. Why are you looking so thin and pale?
— I’ve been ill for weeks and still under treatment.
| A．can’t recognize | B．could hardly recognize | C．haven’t recognized | D．wasn’t recognizing |
Many teens have too much homework to do, which ____ them up at night.
| A．makes | B．keeps | C．breaks | D．turns |
_____ lie in the sun for too long, _______ you will get sunburnt.
| A．Not; and | B．Don’t; otherwise | C．Shouldn’t; for | D．Let’s not; and |