In 1978, a young pilot and his plane _____ after sighting a UFO, and they can never be found again. (APPEAR)
A.
B.
C.
D.

John (have) _____ this bike since his eleventh birthday.
A.
B.
C.
D.

Tom spent three months (learn) _____ to play the piano.
A.
B.
C.
D.

He advised me (4. take) part in this contest.
A.
B.
C.
D.

When I came, he (3.watch) TV.
A.
B.
C.
D.

You (1. ever/ talk) to a foreigner before? - Yes, I (2. have) a chance to talk with some during my last vacation in Nha Trang.
A.
B.
C.
D.

No one has used this machine for some years.
This machine _____________________________________________.
A.
B.
C.
D.

The scientist has won the Nobel Prize because he discovered a new planet.
The scientist who __________________________________________.
A.
B.
C.
D.

It is raining, so I can’t go out with my friends.
If it _____________________________________________________.
A.
B.
C.
D.

“Do you like watching documentary?” he said to me.
He asked me ______________________________________________.
A.
B.
C.
D.