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I couldn’t help but_____very concerned about his illness when I heard he was in hospital because of heart disease.

A．to feel

B．feel

C．feeling

D．to have felt

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The number of various educational programs is increasing, _______ important roles have been realized by more and more people.

A．whose

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C．which

D．that

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A．cover

B．shelter

C．hiding

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--- Oh, it really is ________ useful reference book, which is worth reading ________ second time.

A．a; a

B．an; the

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--Mary, remember to come and see us next time you’re in town.
---__________.

A．Why? I’ll certainly do	B．Sounds nice
C．You’re welcome	D．Sure, I will

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——Shall I give you a ride as you live so far away?
——Thank you. ______.

A．If you like	B．Of course you can
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