------ It is         he often fails in the exams          makes his parents worried about him.
------ So, he has to work whole- heartedly.

I ______ myself more-----it was a perfect day.

I am afraid that Mrs. Black doesn’t believe her son is able to design such a complicated machine,       ?

— Why did he say so?
— Sorry, I don’t understand       he has said means.

_________ to the association of success with money that the thought of giving up good salary for an idea seems like a little bit crazy.

He failed the mid-term examination and only then________how much time he had wasted.

________is no possibility________she can finish the task in two hours.