The time has come ______ we can make extensive use of nuclear energy．
| A．when | B．which | C．since | D．while |
If the car won’t start, _____ it.
| A．try push | B．try pushing |
| C．to try pushing | D．to try to push |
What worried the child most was ______ to visit his mother in the hospital.
A. his not allowing B. his not being allowed
C his being not allowed D. having not being allowed
What have we said _______ her so happy?
| A．makes | B．to make |
| C．made | D．has made |
“Good morning. Can I help you?” “I’d like to have this package _______.”
| A．be weighed | B．to be weighed |
| C．to weigh | D．weighed |
Tony was very unhappy for _______ to the party.
| A．having not been invited | B．not having invited |
| C．having not invited | D．not having been invited |