Câu hỏi:  I cannot undo the _____ in this piece of string.

A. bunch

B. lock

C. knot

D. tie

Câu 1: He has always gone _____ strange hobbies like collecting bottle-tops and inventing secret codes.

A. into

B. by

C. in for

D. through

Câu 2: When he makes a _____ by car, he takes his family with him.

A. course

B. passage

C. voyage

D. journey

Câu 3: Shut the window and _____ the cold _______.

A. keep … in

B. keep … out

C. keep … down

D. keep … behind

Câu 4: The police had to _____ the crow ______.

A. keep … to

B. keep … under

C. keep … back

D. keep … on

Câu 5: The businessman proved to be an apparently well-behaved ______ middle-aged man.

A. offensive

B. unoffending

C. inoffensive

D. innocent

Câu 6: The boy’s allergy to dust caused his skin to _______.

A. itch

B. rub

C. blemish

D. flush