Question

【题目】My parents ______ some trees in front of the house since last spring.

A. plant B. have planted

C. planted D. were planting

Answer 1

【答案】B

【解析】试题分析：句意：自去年春天以来，我的父母在房子前面种植了一些树。since last spring. 自去年春天以来，一直到现在，表示的是时间段，用于现在完成时态。故答案为B。