—Mom！Jack has broken a cup！
—Doesn’t matter. Accidents ________ happen.
| A．should | B．must |
| C．will | D．Shall |
Although the country has had political independence for over a century，__________ it needs the support of its neighbors.
naturally B. economically C. especially D. Luckily
— Is there any possibility __________ you could pick me up at the airport?
—No problem.
| A．when | B．that |
| C．whether | D．what |
I suggested that we break off for tea in a( n)__________ to reduce nervousness.
| A．attempt | B．thought |
| C．preparation | D．expectation |
It remains __________ whether this teaching method will be better than that one.
| A．to see | B．to be seen |
| C．seeing | D．seen |
It was not until midnight __________ they reached the camp site.
| A．that | B．when |
| C．while | D．as |