----I think it’s impossible for us to work out the plan in just two days. It’s too difficult.----You’re right. We can’t be _______ careful and hard while working on it.
I have some problems with my health. Can you give me some _______?
Some medicine is dangerous for children. Parents should put the medicine in places children can’t _______.
I can do many kinds of housework _______ cooking. I’ll learn it from my mother.
I think _______ necessary for you _______ breakfast.
—Wang Yi plays basketball so well! Who taught _______? —He learnt it by _______.