Put the book ________ it should be when you have finished reading it．

A．where

B．in which

C．at the place

D．the place where

________ I had time, I would have run round that lake again．

A．If

B．Unless

C．Had

D．When

What ________ public is concerned about is whether medical workers and scientists will be able to find ________ cure for this new disease in a short time．

A．/; /

B．/; the

C．the; /

D．the; a

Come and see me whenever ________．

A．you are convenient

B．you will be convenient

C．it is convenient to you

D．it will be convenient to you

Yesterday Li Hua ________ a card from one of his classmates who is now a college student, in which he was invited to attend a birthday party．But Li Hua said he was very busy those days and he would not ________ the invitation．

A．accepted; received

B．accepted; receive

C．received; accept

D．receive; accepted

________ from other continents for millions of years, Australia has many plants and animals not found in any other country in the world．

A．Being separated

B．Having separated

C．Having been separated

D．To be separated

Many people ________ their thoughts into a diary but other write in ________ is called a journal．

A．place, where

B．put, one

C．place, that

D．put, what

________ it enters Southeast Asia, it travels slowly ________ hills and low valley, and the plain ________ rice grows．

A．As, over, where

B．As, through, where

C．When, over, that

D．when, through, that

Can it really be true ________ soon we're going to be able to go outside, to run about, to eat and drink ________?

A．that, we want what

B．when, what we want

C．that, what we want

D．when, anything we want

In order not to be disturbed,I spent three hours ________ in my study．

A．locking

B．locked

C．to lock

D．be locked