Oh，my god!I've left my keys in the room．I'll have to get in_____ the window．
It's dangerous．You'd better wait for your mom to come back．（ ）
A．pastB．overC．acrossD．through
—I called you several times this afternoon. Why didn’t you answer the phone?
--I’m sorry. I ________ an important meeting then.
| A．is having | B．was having |
| C．will have | D．have had |
My little sister_________ in the hall at that time yesterday.
| A．dance | B．dances |
| C．is dancing | D．was dancing |
Our English teacher _____________ to Martin when I entered the classroom this morning.
A. is talking
B. was talking
C. talked
(2014)I great progress in my English study since last year.
| A．make | B．will make |
| C．have made | D．made |
Great changes in my hometown recently.
A.took place
B. happened
C.have taken place