Question

1. ―W hat did you do yesterday？

―I had_picnic with_Blacks on the  beach.

A.a;lhr B.不填；不填

C.the;a I), the; the

Answer 1

l.A have a picnic意为"去野餐"，是固定短语；表示"…… —家"或"……夫妇"，用"the+姓氏复数"。