_____ it will do us harm or good remains to be seen.
A survey of the opinions of experts ____ that drinking a glass of hot milk before going to bed helps one sleep well.
—Which of the two iPods do you prefer? —To tell you the truth, I don't like _____ of them.
______ in her novel that she didn’t hear what I was saying.
You never imagine what trouble I have had ______ your house.It took me nearly 2 hours.
I _____ when it began to rain.