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單項(xiàng)選擇題You should explore your talents so as to find（）your real interests lie．

A.how
B.what
C.where
D.which

1.單項(xiàng)選擇題 一John and l will celebrate our fortieth wedding anniversary next month．
一Oh，（）。

A.well done!
B.cheer up!
C.go on!
D.congratulations!

2.單項(xiàng)選擇題Classification of vowels is made up of the following EXCEPT（）。

A.the openness of the mouth
B.the position of the tongue
C.the shape of the tip
D.the width of the vowels

3.單項(xiàng)選擇題You’ll find taxis waiting at the bus station，（）you can hire to reach your host family．

A.which
B.when
C.where
D.As

4.單項(xiàng)選擇題下列說法：①全等圖形的面積相等；②全等圖形的周長相等；③全等的四邊形的對(duì)角線相等；④所有正方形都全等。其中正確的結(jié)論的個(gè)數(shù)是（）。

A.2個(gè)
B.1個(gè)
C.3個(gè)
D.4個(gè)

5.單項(xiàng)選擇題三角形的重心是（）。

A.三條高線的交點(diǎn)
B.三條邊的中點(diǎn)
C.三條角平分線的交點(diǎn)
D.三條中線的交點(diǎn)