Teenagers are supposed to ________ their seats to the old on bus.
| A．pass | B．offer | C．sell | D．provide |
－ ________ does the bridge made of steel weigh? －About 90,000 tons.
| A．How much | B．How long | C．How heavy | D．How far |
the end , my father asked me to teach French.
| A．At, my | B．At, himself |
| C．In, his | D．In, myself |
The boss wants to keep his shop _______ for another three hours.
| A．open | B．opened | C．opens | D．opening |
When he walks______my desk，he knocked my books and pens _____the floor．
| A．passed；away | B．past；away |
| C．passed；onto | D．past；onto |
Chinese students have weeks in the summertime than American students.
| A．more; on | B．fewer; on |
| C．more; off | D．less; off |