I know Mr. Brown；we ＿＿ to each other at an international conference.
| A．are introduced | B．have been introduced |
| C．were introduced | D．had been introduced |
.
What a pity! I missed meeting my boss at the airport because my car was ______ in the traffic jam.
| A．broken up | B．broken down | C．held up | D．kept up |
.
Along with the letter was his promise ______ he would visit me this coming Christmas.
| A．which | B．that | C．what | D．whether |
.
It is unbelievable that a well- behaved gentleman ______ be so rude to a lady.
| A．will | B．may | C．must | D．should |
.
--- It was a pity that you missed the famous star yesterday.
--- ______ I hadn’t returned to my hometown.
| A．except that | B．only if | C．if only | D．even though |
.
The boy _____ in the bed _____ to his friend that a cock laid an egg yesterday.
| A．lay,lay | B．lying ,lay | C．lying, lied | D．lied, lying |