Often he _________ sit for hours doing nothing at all when he was in low spirits.
| A．should | B．would | C．might | D．could |
The science of computer,____ rapid progress has been made, is the most important of all.
| A．to which | B．from which | C．in which | D．of which |
Before use, your new mobile must fully____.
| A．get charged | B．become charged |
| C．remain charged | D．turn charged |
—Remember not to pretend to know what you don’t know.
— _____. My last lesson is still fresh.
| A．No, I will | B．No, I won’t | C．Yes, I won’t | D．Yes, I will |
With the help of the new teacher, ____number of the students in my class who have made____ great progress in English up to now is far larger.
| A．the; the | B．a ; a | C．the ; / | D．a ; / |
I called Hannah three times yesterday evening, but I couldn’t get through, her brother _______on the phone all the time.
| A．was talking | B．has been talking | C．has talked | D．talked |