All the students in our class buried themselves ________studies,________the coming exam.
.It is suggested that the students’ homework _______ in time.
John knows so much about stars that I am sure it would be impossible to find someone who is ___ to him.
The reason why she had a headache was _______ she had been reading for too long.
The man in black has two children, one of whom _______ in a foreign country.
I’ll tell you ______ he told me last week.