____ the end of the performance did the audience get the chance to take photos with the respectable actor.
| A．At | B．By | C．Up to | D．Not until |
The book,_______________as a surprise for his sister was lost in the mail.
| A．intended | B．to be intended | C．Intending | D．being intended |
Between the two roads_________ a TV tower called“Skyscraper Tower”.
| A．stands | B．standing | C．which stands | D．stand |
______
__________ surprised us very much that Tom should have left without a word.
| A．He | B．It | C．This | D．That |
It is reported that two schools, _________are being built in my hometown, will open next year.
| A．they both | B．which both | C．both of them | D．both of which |
He tried his best to solve the problem, _______difficult it was.
| A．however | B．no matter | C．whatever | D．although |