They _______ the insects carefully.
A.watching B.are watching C.is watching
（）Yesterday they _____on the wall for one hour.
A.walk B. walks C. walked
（）—____did you go there?
—I went there by train.
A.WhereB. How C. When
（）They went to school _________plane.
A.by B .in C. on
找出不同类的单词。
（）（1）A.didB. doC. go
（）（2）A.placesB. visitedC. photos
（）（3）A.longB. goodC. had
（）（4）A.went B. busC. train
（）（5）A.were B. walkC. took
（）—_______pears did you buy?
—Five.
A.How many B. How much C. How about