1 . On our way to the house， it was raining so hard ____________ we couldn’t help wondering how long it would take to get there. （用适当的单词填空）

2 . You can use an egg timer to count down to fifteen minutes        you won’t need to constantly look at the clock to see how much time has gone.

A．even though	B．now that
C．in case	D．so that

3 . The teacher set such difficult problems ______ nobody could work out _____ none of us passed the test.

A．/ ; that	B．that; as
C．as; that	D．as; as

4 . Such good use had been            his spare time_________ his English has improved a lot．

A．made of；as

B．made of ;that

C．made in；that

D．found in；as