They ______ Hong Kong twice.
| A．have gone to | B．have been to | C．have been in | D．have gone in |
I can’t find my key. _______ I left it at home.
| A．May | B．May be | C．maybe | D．Maybe |
— Is there ____ wrong with your bike?
— No. But there is _____ wrong with my watch.
| A．something, something | B．anything, something |
| C．something, anything | D．anything, anything |
— Sandy, _______ apple on the table is for you. Remember to eat it.
—Thanks, I will. _____ apple a day keeps the doctor away.
| A．a; An | B．the; An |
| C．an; The | D．the; A |
—Do you think if Tom _______ the work well?
—I think he will if he ______ his best.
| A．does， will try | B．will do ，tries |
| C．does ，tries | D．will do ，will try |
This website can help you learn and have fun _________.
| A．at the same time | B．from time to time |
| C．at a time | D．on time |