If you will send us a catalogue by air, we shall ( ) very much.<br />A.be indebted<br>B.be grateful<br>C.thank<br>D.appreciate it

If you will send us a catalogue by air, we shall ( ) very much.
A.be indebted
B.be grateful
C.thank
D.appreciate it

出自：国家开放大学英语语法

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