It’s obvious that his ______ to the problem is wrong, so we’d better try another way to solve it.
It is usually warm in my hometown in March, but it be rather cold sometime.
Mary answered all the questions __________the last one, which she had never heard of before.
I've worked with children before, so I know what__________ in my new job.
Get down to the experiment right away if possible,__________ you will not finish it before dark.
---What do you think made Mary so upset? --- ______ her new bike.