why didn't she dare to take her car to the mechanic when she was in high school? A: Because she didn't know anything about cars and was afraid of being cheated by the mechanic. B: Because she was a bad driver.

We didn’t know whether she _____ at the meeting. A: will speak B: is going to speak C: was going to speak D: can speak

My mother didn’t say _____ she had changed her mind. That doesn’t matter. A: that B: whether C: what D: why

I didn’t know ______ Tom was coming. A: if B: whether C: if not D: whether or not

On hearing the bad news, she was _______ and didn't know what to do. A: on her guard B: without a clue C: over her head D: in her time