The last time we had great fun was _____ we were visiting the Water Park.
| A．where | B．how | C．when | D．why |
The first use of atomic weapons was in 1945, and their power ____increased enormously ever since.
| A．is | B．was | C．has been | D．had been. |
–Have you heard the latest news?
-No, what ____?
| A．is it | B．is there | C．are they | D．are those |
The father as well as his three children ___skating on the frozen river every Sunday afternoon in winter.
| A．is going | B．go | C．goes | D．are going |
Not Tom, but I ___to blame for the failure.
| A．am | B．are | C．is | D．be |
All I have learned about the exam____ that three students faileD.
A. is B. are C. will be D. have been