We first met on a train in 2010，but we both felt immediately that we ________ each other for years.
| A．knew | B．have known |
| C．had known | D．know |
It is often recommended that children _______ chances to get close to nature.
| A．must be offered | B．should offer | C．be offered | D．are offered |
If you _____ the bottle and cigarettes, you we’ll be much healthier.
| A．take off | B．keep off | C．get off | D．set off |
— Will 1000 dollars ______ the bill?
— Of course, more than sufficient.
| A．cover | B．pay | C．contain | D．include |
—You must do as I told you.
— ______ I don’t?
| A．What about | B．How about | C．Only if | D．What if |
Robert failed to seek a job for his poor education, though he is _______ to get one to support his family.
| A．wanting | B．looking forward | C．fighting | D．dying |