I have two brothers, _______ are doctors.
| A．both of them | B．both of whom | C．neither of whom | D．each of them |
The subject of "What is interesting is that I do not even know him." is_______.
| A．what | B．interesting | C．What is interesting | D．I |
Would you go and see ________ outside
| A．what to take place | B．what Tom has happened |
| C．what is happening | D．what the matter had been |
Do you know ________
| A．how many populations there are in the world |
| B．how much population there is in the world |
| C．how many the population of the world is |
| D．what the population of the world is |
Where do you think ________
| A．has he gone | B．has he been | C．he's gone | D．was he |
This book will show you ________ can be used in other contexts.
| A．how you have observed | B．how what you have observed |
| C．that you have observed | D．how that you have observed |