With so much noise of the traffic，I couldn’t________ my research work.
| A．put down | B．settle down |
| C．settle down to | D．take down |
With so much work _________, they feel worried all the time.
| A．doing | B．to do | C．done | D．having done |
It was at 12 o’clock _________ they came home from school.
| A．what | B．when | C．that | D．Which |
I don’t have to do it and _________ do you. We’re both too busy.
| A．more than | B．no more than |
| C．once more | D．no more |
I hear that _________ she is lovely she can be extremely difficult to deal with.
| A．whether | B．as if | C．if | D．While |
The notice says _________ you are, you must show your tickets to enter the exhibition.
| A．whoever | B．who | C．however | D．Whom |