You’d better ______ your flight reservation at the latest 3 days in advance.
| A．confirm | B．convey | C．consider | D．convince |
is easier than doing.
| A．Talking | B．To talk | C．Talk | D．Talked |
Teachers suggested parents their children under 12 to ride bicycles to school for safety.
| A．shouldn’t allow | B．don’t allow | C．mustn’t allow | D．couldn’t allow |
But for their help, we the program in time.
| A．can not finish | B．will not finish |
| C．had not finish | D．could not have finished |
In our class, the student leaders are on duty every few days.
| A．the; a | B．/; a | C．/; / | D．The; / |
by a policeman, the children crossed the street safely.
| A．To lead | B．Lead | C．Leading | D．Led |