25. Whenever I go to Beijing, ____ is quite frequent, I will go to visit the Great Wall.
| A．where | B．which | C．as it | D．It |
Bats are surprisingly long-lived creatures, some ________ a life span of 20 years.
| A．having | B．had | C．have | D．to have |
We won’t ______ you ______ away with cheating in the exam.
| A．let; getting | B．have; get | C．let ; keeping | D．have; getting |
The surgeon suggested that he __________ at once.
| A．needed operating on | B．needed operation |
| C．need operating on | D．need to be operated |
Great changes have taken place in that school. It is no longer_____ it was 20 years ago,__________ it was so poorly equipped.
A. what; when B that; which C. what; which D. which ;that
It is strongly recommended that the machine_____________ every year.
| A．are checked | B．should check | C．checked | D．be checked |