Tuan's parents was disappointed ...............him because he failed the final test.
A.with
B.in
C.for
D.about

I am extremely grateful .....… all the teachers ….… their help.
A.to - for
B.to - about
C.for - with
D.to - on

He’s sitting …….the chair .….… to the piano.
A.in - inside
B.in - into
C.on - next
D.on - near

She suffers ….… a lack of confidence.
A.about
B.into
C.to
D.from

_________(1)
A.role
B.flagship
C.important
D.importance

In my opinion, I think the problem should be solved as soon as possible.
A.In
B.I think
C.the
D.should be

Lack of sanitation in restaurants are a major cause of disease in some areas of the country.
A.of sanitation
B.are
C.cause of
D.in some areas

A.uncertain
B.arrogant
C.familiar
D.impatient

In my view the changes to the education system have been to good ____
A.outcome
B.upshot
C.influence
D.effect

Until he spoke I hadn't realized he didn't know anything about the subject.
A.If he didn't speak, I wouldn't realize he didn't know anything about the subject.
B.If he hadn't spoken, I wouldn't have realized he didn't know anything about the subject.
C.Unless he spoke I wouldn't realize he didn't know anything about the subject.
D.When he spoke I hadn't realized he didn't know anything about the subject