A number of high buildings have arisen _______ there was nothing a year ago but ruins.
| A．when | B．where |
| C．before | D．until |
—Why don't you take a taxi there? It will save you a lot of time.
— __________.
| A．Thank you | B．That's all right |
| C．Good idea | D．You are welcome |
He stayed up late into night yesterday. This is __________ he was late for school.
| A．because | B．why | C．that | D．what |
From the __________ expression on her face, we knew that she was very __________ with the result.
| A．exciting; pleasing | B．exciting; pleased |
| C．excited; pleased | D．excited; pleasing |
On Mother's Day, mothers often receive a bunch of carnations (康乃磐) as a __________ of love from their children.
| A．means | B．signal | C．symbol | D．sign |
Mark now has reached a stage __________ he needs to continue this progress and win the title.
| A．which | B．what | C．that | D．where |