— Can you tell us _________ yesterday, sir? — By bus.
| A．how did you arrive here |
| B．how you arrived here |
| C．how will you arrive here |
| D．how you will arrive here |
Planting apple trees is _____ interesting work, don’t you think so ?
| A．a | B．an | C．the | D．/ |
．You ________ read in the sun, it’s bad for your eyes.
A. ought not B. ought to C. ought not to
—What does the Sign 
on the bottle mean? —It means “________”.
A. dangerous B. save water C. recycling
Hurry up, _________ you will miss the bus.
A. or B. and C. but
We _________ finish our homework on time.
A. is supposed to B. be supposed to C. are supposed to