They pretended ________ hard when their boss passed them.
A. to work B. being worked 
to be working D. working
Gun control is a subjectAmericans have argued for a long time.
| A． | of which | B． | with which | C． | about which | D． | into which |
Jane was asked a lot of questions, but she didn’t answer ______ of them.
| A．other | B．any | C．none | D．some |
This is the first time wenta film in the cinema together as a family.
| A． | see | B． | had seen | C． | saw | D． | have seen |
He invited me to a dance after the show_______Christmas Eve.
| A．at | B．on | C．in | D．by |
Dr. Smith, together with his wife and daughters, _____visit Beijing this summer.
| A．is going to | B．are going to | C．was going to | D．were going to |