— What's the population ____ the U.S.A?
— The U.S.A has ____ population of 297 million.
| A．of…a | B．of… /, | C．in…a | D．in … some |
As we know, England is European country and Singapore isAsian country.
| A．an； an | B．an； a | C．a； A | D．a； an |
He asked his father ________?
| A．where it happens | B．where did it happen |
| C．how it happened | D．how did it happen |
---How will you go to the zoo tomorrow?
---If it ______ tomorrow, I’ll go there by car．
| A．raining | B．rain | C．rains | D．will rain |
While Helen ________ the piano，her mother came in．
| A．was playing | B．is playing | C．played | D．plays |
The shorts are _________ of all, but they are _________．
| A．best, cheaper | B．better, dear |
| C．the best，dear | D．good, cheap |