He is not suitable for the job—No. I have serious about his ability to do it.

We’ll have a picnic in the park this Sunday ________ it rains or it’s very cold.[ ]

We had a football match with No. 15 Middle Schoolyesterday. —________. I missed it.

It was not until the teacher had explained it three times _______ how to work out the problem.

Tom ______a small tent near the lake and enjoyed counting the stars at night.