__________, 70 percent alcohol is more effective than 100 percent alcohol.
A.How an antiseptic is used
B.An antiseptic used
C.When used as an antiseptic
D.An antiseptic when used

- Nhung: “If you ask me, action movies are great!” - Tuy:“ ____________________ “
A.You can say it again
B.Never mind
C.That’s that
D.Sure. It’s my pleasure.

This naughty fellow ______ at his wife at any time.
A.nags
B.looks
C.irritates
D.conflits

Mr Henderson was determined to remain neutral.
A.unmarried
B.uncommitted
C.untroubled
D.unhurried

A.overwhelming
B.incredible
C.optimistic
D.intellectual

When you have a small child in the house, you _______ leave small objects lying around. Such objects ________ be swallowed, causing serious injury or even death.
A.needn't / may
B.should not / might
C.mustn't / can't
D.should / must

I have ______ him to act for me while I am away.
A.authorized
B.notified
C.let
D.given

Helen is _______ seafood, so she never tries these delicious dishes.
A.allergic to
B.tired of
C.keen on
D.preferable to

- Nam: “Do you have a minute, Dr Keith?” - Hoa: “__________”
A.Well. I’m not sure when
B.Good, I hope so
C.Sure. What’s the problem?
D.Sorry, I haven’t got it here

By 2050, medical technology _______ many diseases.
A.is conquering
B.will conquer
C.has conquered
D.will have conquered