Question

270 ) Choose the correct tense form: The children …. (play) with the cat, when mother …. (come) in.

271 ) As a child I …. a lot of time with my grand parents.​

Answer 1

were playing, came. 271) have spend

Answer 2

Correct Tense Form

(270) The children were playing with the cat when mother came in.

(271) As a child I spent a lot of time with my grandparents.

Explanation:

In the first sentence, after reading the sentence properly we can see that the sentence wants to convey as what the children were doing when their mother came in. The first blank should be in past perfect continuous tense and the second blank should be in simple past tense.

For the second sentence, it will be in simple past tense. This can be understood by looking at the sentence closely.