－________ leave at the end of this month．

－I don't think you should do that until ________ another job．

A．I'm going to; you'd found

B．I'm going to; you've found

C．I'll; you'll find

D．I'll; you'd find

Customers are asked to make sure that they ________ the right change before leaving the shop．

A．will give

B．have been given

C．have given

D．will be given

The water ________ cool when I jumped into the pool for morning exercise．

A．was felt

B．is felt

C．felt

D．feels

See the flags on top of the building? That was ________ we did this morning．

A．when

B．which

C．where

D．what

It was some time ________ we realized the truth．

A．when

B．until

C．since

D．before

－Father, you promised!

－Well, ________．But it was you who didn't keep your word first．

A．so was I

B．so did I

C．so I was

D．so I did

Years ago we didn't know this, but recent science ________ that people who don't sleep well soon get ill．

A．showed

B．will show

C．has shown

D．is showing

The coffee is wonderful! It doesn't taste like anything I ________ before．

A．was having

B．have

C．have ever had

D．had ever had

1930s were hard times ________ many people lost their jobs and couldn't survive．

A．where

B．when

C．which

D．then

Two middle-aged passengers fell into the lake．________, neither of them could swim．

A．In fact

B．Luckily

C．Unfortunately

D．Naturally