— What's the population ____ the U.S.A?— The U.S.A has ___

 — What's the population ____ the U.S.A?— The U.S.A has ____ population of 297 million.

#27937

of…a

of… /,

in…a

in … some

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— How is the _______ in Tiandong?— It’s getting worse and worse. There are always long lines of cars on roads.

#27757

culture

food

weather

traffic

Tom is in _____.

#29338

Class One

Class one

class one

the Class One

The _____ now is that we have many _____ to ask.

#29394

problem; questions

problems; question

question; problems

questions; problem

______ arrived ten minutes after Mrs Cousins telephoned them.

#29284

The police

The polices

A policemen

Police

---Could you please help me check what's wrong? ---Sorry, I don't have much _______of the computer.

#29599

introduction

development

knowledge

information

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