You’d better carry a(n) ________ tyre in the back of your car in case it breaks down on the way.
| A．extra | B．free | C．convenient | D．spare |
It was a matter of________ would take the position.
| A．who | B．whoever | C．whom | D．whomever |
it rain tomorrow, we would have to call off the hike.
| A．Will | B．Would | C．Should | D．Were |
The government has decided to give preference to those environmently-friendly business and companies in all aspects in _______ of sustainable development.
| A．case | B．terms | C．honor | D．concerns |
The Voice of China is such a popular program with viewers has produced many a music-lover.
| A．who | B．that | C．where | D．as |
The split between humans and apes is believed by scientists______15 to 20 million years ago.
| A．to be occurring | B．having occurred | C．to have occurred | D．to occur |