At last, we found ourselves in a pleasant park with trees providing shade and ________ down to eat our picnic lunch.
A.sitting B.having sat C.sat D.to sit
—I don’t really like James. Why did you invite him?
—Don’t worry. He ________ come. He said he wasn’t certain what his plans are.
A.must not B.need not C.would not D.might not
Ladies and gentlemen, please remain __________ until the plane has come to a complete stop.
A.seated B.seating C.to seat D.seat
—Now that you like the laptop so much, why not buy one?
—Well. I can’t afford ________ computer at present.
A.that expensive a B.such expensive a C.that an expensive D.a that expensive
Generally speaking，________ according to the directions，the drug has no side effect.
A.when taking B.when taken
C.when to take D.when to be taken
The past decades have witnessed China's many scientific achievements ______ the development of Shenwei supercomputers is a typical example
A.to which B.for which C.in which D.of which
