We believe scientists will a way to solve the problem of air pollution.
| A．set off | B．put off |
| C．come up with | D．catch up with |
My mother asked me if ______________ a picnic the next week in our school.
| A．there will have | B．there will be | C．we would be | D．we would have |
The traveling magazine________ me $ 20 .
| A．spends | B．cost | C．buys | D．sold |
The timetable(时刻表) tells us __________________________every day.
| A．when does the train arrive | B．when the train will arrive |
| C．when will the train arrive | D．when the train arrives |
You’d better work in your hometown and then you can ________ your old father.
| A．look at | B．look over | C．look out | D．look after |
My younger sister is always _________ but she also likes listening to others quietly.
| A．outgoing | B．angry | C．calm | D．friendly |