Question

【题目】The students usually do scientific experiments with the teacher _____ beside to help them.
A.were standing
B.stood
C.standing
D.to stand

Answer 1

【答案】C
【解析】句意：学生做科学实验的时候，通常老师站在旁边帮助他们。with + 名词 + -ing分词（强调名词是 -ing分词的动作的发出者或某动作状态正在进行），选C。