The year 1949 ________ the birth of a new country — the People’s Republic of China.
A. happenedB. gaveC. hadD. saw
Eric received training in computer for one year, ________ he found a job in a big company.
A. after thatB. after whichC. after itD. after this
Even though we have made much progress in preventing pollution, yet much ________.
A. is remained to doB. remains being done
C. remains to be doneD. is remained to be done
The thought of going back home was ________ kept him happy while he was working abroad.
A．thatB．all thatC．all whatD．which
He gave us a lot of help when we were in trouble, but we have nothing to give him ________.
A. in dangerC. in needC. in returnD. in fact
She brought with her three friends, none of ________ I had ever met before.
A. themB. whoC. whomD. these
