I like these English songs and they __________ many times on the radio.
| A．taught | B．have taught |
| C．are taught | D．have been taught |
I ______ him in time, otherwise he would have fallen off the bike.
| A．had supported | B．supported | C．have supported | D．Support |
_______ the calculation is right, scientists can never be sure that they have included all variables and modeled them accurately.
| A．Even if | B． As far as | C．If only | D． So long as |
---How do you think I can make up with Qiong?
---Put aside_____ you disagree and try to find_____ you have in common.
| A．what, what | B．where, what | C．what, whether | D．where, whether |
“If" he added, “________ to carry out the plan, we would surely make a big profit for our company."
| A．to permit | B．to be permitted | C．permitting | D．Permitted |
Between the two periods of classes is a break,_____we can have a short rest.
| A．then | B．where | C．when | D．Which |