第二部分选择填空(共20小题;每小题1分,满分20分)21.—Have you seen _______ pen? I left it here this morning.—Is it _______ black one? I think I saw it somewhere.
---- I’m taking a taxi to the airport to pick up my daughter. ---- ______________? I can give you a lift.
New digital mobile phones definitely produce less radiation, but that doesn’t ______ mean that they should be used without caution.
---- Could I take a few days’ leave, sir? ----- I’m afraid you can’t ___________ the work is being done.
The money will be paid to everyone ___________ whether they have children or not.
If we keep wasting so much energy, ________ are that our oil wells will dry up and the environment will be destroyed.