—What is the man, do you know? —I don’t know exactly. But I think he can be but a teacher.
The medicine _____ natural plants.
----- I’m going to the States. ----- How long ______ you ______ in the States?
I don’t think _____ possible to master a foreign language without much memory work.
----- My father will be here tomorrow. ----- Oh, I thought that he _____ today.
She likes playing _____ guitar while her brother is fond of playing _____ football.