Choose the right verb forms: Does the professor __________________ a lot of experiments?

№ Choose the right word: Are there __________________ German students in your class? № Choose the proper word: Soon he established __________________ as one of the country troubleshooters. № Choose the right form of the verb: “Not __________________ to discuss it he changed the subject.”. № Henry Longfellow is __________________ poet. № Choose the right form of the verb: An old lady was in hospital after __________________ attacked. № Choose the right verb forms: We thought they __________________ be late.