---What’s wrong with you, Mr. Keller?
--- I’ve had a very bad headache for two days. At first, I ______ I caught a cold, but the medicine ______.
| A．thought, hasn’t worked | B．had thought, didn’t work |
| C．thought, hadn’t worked | D．have thought, hasn’t worked |
I cannot _______ that all of the students will enjoy your classes. After all, students’ tastes vary.
| A．appoint | B．subscribe | C．guarantee | D．evaluate |
_______no doubt that a green campus plays an important role in the growth of students, both physically and mentally.
| A．It is | B．There has | C．There is | D．It has |
How nice it _______ if I _______ an elder brother like you!
| A．was; had | B．would be; had had | C．would have been; had | D．would be; had |
An engineer has designed _______ robot that can work in _______ deep sea to clean waste.
| A．a; the | B．a; a | C．/; the | D．the; / |
—What do you think I should wear for such a formal press conference?
—Dress _______ you like.
| A．how | B．what | C．whatever | D．however |