People who often sleep a lot but don’t do a lot of __ _ will not be very healthy.
| A．exercise | B．exercising |
| C．exersises | D．to exercise |
I have _____ useful dictionary. Do you have ______?
| A．a, one | B．a, it |
| C．an, that | D．an, one |
About seventy percent of our earth _______ by water.
| A．is covering | B．is covered |
| C．are covered | D．are covering |
Don’t worry about your boy. His temperature will ______ back to normal（正常）if he takes this medicine.
| A．drop | B．rise | C．go | D．travel |
Don’t ______ until the bus stops. Or it’s too dangerous.
| A．get it on | B．get into it |
| C．get off it | D．get it off |
Mr. Smith was ill ______. He had to have three weeks ______.
| A．in hospital, off | B．in the hospital, rest |
| C．in hospital, rest | D．in the hospital, off |