_______ provides many hours of air for astronauts in space.
| A．An air tank | B．A power pack | C．A helmet | D．A space sleeping bag |
–Let’s play pingpong.
--That _____ good.
| A．are | B．be |
| C．sound | D．sounds |
--This is my good friend, ____ name is David. –Nice to meet you.
| A．her | B．his |
| C．he’s | D．her’s |
–Are these his friends? --No, ______.
| A．they are | B．they aren’t |
| C．these are | D．these aren’t |
–_______. What’s this in English? --_______, I don’t know.
| A．Excuse me, Excuse me | B．Sorry, Sorry |
| C．Excuse me, Sorry | D．Sorry, Excuse me |
In _____room, you can see a lot of things. But some of them are not _____.
| A．mine, my | B．mine, mine |
| C．my, my | D．my, mine |