﹣﹣﹣_________do your parents come to visit you in the US， Tom？
﹣﹣﹣Once a year．（ ）
| A． |
How often |
B． |
How long |
C． |
How soon |
D． |
How far |
Thank you very much for giving me some advice on how to deal with stress．
（ ）
A．That's trueB．Don't mention it
C．OK，I'll tryD．I don't think so
I wonder．
Yes，of course．（ ）
A．why we will visit this museum
B．when we will get to the museum
C．whether the museum is worth visiting
D．what we can see in the museum
In Switzerland，things like glass and plastic into different groups and then recycled（ ）
A．separateB．separated
C．are separatedD．is separated
Watch out，Peter! is a little boy playing ahead on the road．（ ）
A．ItB．ThisC．ThatD．There
My grandma's hobby is cooking watching TV，It's square dancing （ ）
A．not only；but alsoB．neither；nor
C．both；andD．either；or