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－________ does your sister walk her dog?

－Once a day．

A．How many

B．How long

C．How soon

D．How often

The fridge is making ________ noise．I don’t know what ________ with it．

A．too much; is wrong

B．too much; wrong is

C．much too; is wrong

D．much too; wrong is

－It’s very ________ to learn English well．

－But if your work hard, it will become easy．

A．easy

B．necessary

C．useful

D．difficult

－Shall we go shopping this afternoon?

－________!

A．That’s all right

B．Right

C．Good idea

D．Yes, me too

There ________ elephants if we don’t protect them．

A．won’t be any

B．will have no

C．won’t be some

D．will be some

Baby tigers ________ to catch other animals if they watch their mothers．

A．learn how

B．will learn what

C．learn why

D．learn when

If I walk ________ a rainforest, I will see some strange birds．

A．over

B．under

C．through

D．towards

We are going to make wild animal reserves ________ and build more reserves．

A．big

B．bigger

C．smaller

D．small

At first, the baby ________ her mother’s milk for ________ to 6 hours a day

A．drank up

B．drinks big

C．will drink up

D．drink large

At four months, the baby panda go outside her home ________ the first time．

A．at

B．for

C．of

D．in