________ the question of how global warming has _________, we are doing some projects at school.
| A．Exploring, come about | B．To explore, come out |
| C．Having explored, come to | D．Being explored, come over |
Eye doctors recommend that a child's first eye exam ________ at the age of six months old.
| A．was | B．be | C．were | D．is |
My mom suggests that we ________ eat out for a change this weekend.
| A．should | B．might | C．could | D．would |
—Do you think George has passed the driving test?
—No.If so，he ________ his car to our college yesterday.
| A．would drive | B．drove |
| C．would have driven | D．had driven |
If we________a table earlier, we couldn't be standing here in a queue.
| A．have booked | B．booked |
| C．book | D．had booked |
The door________open，no matter how hard she pushed.
| A．shouldn't | B．couldn't | C．wouldn't | D．mightn't |