He objects to ________ the students do their homework late at night.
| A．make | B．making | C．force | D．forcing |
He reached the station _____ only _____ that the train had just left.
| A．tired；learned | B．tiring；learning | C．to tire；to learn | D．tired；to learn |
——We can never forget the days _______ the two astronauts in spaceship worked together and the days ________ we spent together.
| A．when; which | B．which; when | C．what; that | D．on which; when |
The housewe used to livehas been rebuilt．
| A．where；in | B．which,／ |
| C．in that；／ | D．in which；／ |
In an experiment, pet owners are being encouraged to take their pets to work, a move _______ can be good for both the people and the pets.
| A．that some scientists say | B．in which some scientists say |
| C．some scientists say that | D．some scientists say |
By nine o'clock, all the Olympic torch bearers had reached the top of Mount Qomolangma, ___________ appeared a rare rainbow soon.
| A．of which | B．on which | C．from which | D．above which |