【题目】Self-driving vehicles still have a long way to go they can reach the mass production stage.
A.when
B.since
C.as
D.before

【题目】All the scientific evidence ______ that increasing use of chemicals in farming______ damaging our health.
A.show; are
B.shows; are
C.show; is
D.shows; is

【题目】It's nearly 7 o'clock. Jack ____________ be here at any moment.
A.shall
B.had to
C.ought to
D.have to

A. Play baseball.B. Watch a game.C. Do her work.

A. The acting.B. The music.C. The scenery.

A. Some drinks.B. Some fruit.C. Some desserts.

A. At 4 p.m.B. At 5 p.m.C. At 8 p.m.

【题目】William was late. He ____________ earlier if he was really serious about the interview.
A.may have come
B.should be coming
C.ought to have come
D.must have come