It is very important for English teachers to have a knowledge of the theories of language_______.
| A．fluency | B．accuracy | C．acquisition | D．punctuation |
How can I help them to understand ___ they won’t listen to me？
| A．while | B．even though | C．when | D．as if |
I would love ___ to the party last night but I had to work extra hours to finish a report.
| A．to have gone | B．having gone | C．going | D．to go |
Leonardo da Vinci (1452-1519) ____ birds kept in cages in order to have the pleasure of setting them free.
| A．is said to be buying | B．is said to have bought |
| C．had said to buy | D．has sad to have bought |
_____, we decided to spend the night at the foot of the mountain.
| A．With the moon appeared | B．The moon appeared |
| C．The moon being appeared | D．As the moon appeared |
No matter how _____, it is not necessarily lifeless.
| A．a desert may be dry | B．dry a desert may be |
| C．may a desert be dry | D．dry may a desert be |