In order to get the exact result, the scientists made _______.
| A．a lot tries | B．to do experiments | C．trial and error | D．great try |
The Chinese teacher often requires the students to talk about writers and books________they like most.
| A．that | B．which |
| C．who | D．Whom |
John is a creative person. He can often_____ideas that are surprising to his classmates.
| A．come across | B．come up to |
| C．come up with | D．come into |
My father told me that he ________ me some gifts when he returned from America the next week.
| A．will buy | B．buy |
| C．would buy | D．buy |
The cake is delicious. May I have ________ one?
| A．another | B．every |
| C．other | D．more |
John seems puzzled about ________ the question meant.
| A．how | B．why |
| C．what | D．which |