We must _______ to help them out of trouble.
| A．try our best | B．try your best |
| C．try | D．trying |
The number of the books in our school library _______ about50,000.
| A．are | B．has | C．have | D．is |
Something terrible _______him these days. Do you know what’s wrong?
| A．worry | B．worries |
| C．worries about | D．is worried about |
--- I'm feeling so tired now. --- ___________stop and have a rest?
| A．You'd better | B．Why don't |
| C．What about | D．Why not |
John is ______ honest boy. He never ______ lies.
| A．a, says | B．an, speaks |
| C．the ,tells | D．an, tells |
The door is __________ narrow for the elephant __________.
| A．too; to go | B．enough; to go |
| C．so; to go to | D．too; to go through |