有一堆圆形钢管，它的横截面是梯形，上层有2根，下层有7根，共

有一堆圆形钢管，它的横截面是梯形，上层有2根，下层有7根，共有6层，这堆钢管共有（　　）根．
A.20 B.27 C.28

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Mike，don't make so much noise．It's too late．

__________．I'll go to bed right now．（　　）

A．	Not bad	B．	You'd better not
C．	Yes，I will	D．	Sorry，I won't

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Robert，could you wash the car for me？

Yes，I _______．I'm coming，dad．（　　）

A．

could

B．

couldn't

C．

can

D．

can't

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Where is your uncle？I haven't seen him for a long time．

He _______ Beijing for about half a year．He moved there in January．（　　）

A．	has gone to	B．	has been to
C．	has arrived in	D．	has been in

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is it from your home to school？-It's about two kilometers．（　　）

A．

How long

B．

How far

C．

How soon

D．

How often

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This Saturday is my _______ birthday．Welcome to my party!（　　）

A．	fourteenth	B．	the fourteenth
C．	fourteen	D．	the fourteen

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