_____ careful when you cross the road.
[     ]
A. Do be
B. To be
C. Be do
D. To do
It was my sister _____ first had the idea to cycle along the entire Mekong River from _____ it began to where
it ends.

[     ]

A. who; which
B. who; where
C. that; which
D. that; what
It was _____ she was injured in the accident _____ she didn't come to the party yesterday.
[     ]

A. as; which
B. because; that
C. since; why
D. for; how

It was at ten o'clock _____ he came back.
[     ]
A. when
B. after
C. that
D. before
It was in this house _____ he was born and grew up.
[     ]
A. that
B. where
C. which
D. when
Why was _____ you didn't ask your head teacher for help while in trouble?
[     ]
A. it
B. it that
C. there
D. that
Could _____ be in the restaurant _____ you lost your handbag?
[     ]
A. it; which
B. it; that
C. that; that
D. that; where
_____ he will return to his native land.

[     ]

A. It is long before that
B. It is before long that
C. It won't be long before
D. It will be long before that
It was only when I entered high school _____ the importance of English.
[     ]
A. did I realize
B. realized I
C. that did I realize
D. that I realized
He wondered _____ made his wife so happy.
[     ]
A. what that was
B. what was that
C. it was what that
D. what it was that
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