I ______ know how to swim 2 years ago.
举一反三
- I really don't know ____ . A: to swim B: how to swim C: to swim how D: how swim
- It was through John ________ I got to know Mike a few years ago. A: who B: whom C: how D: that
- I know a little about Thailand, as I ______ there three years ago.
- It was through John ________ I got to know Mike a few years ago.
- I don’t know how many years ago _______people began to stay at home and civilization began. A: it was when B: it was that C: was it that D: was it when