IV. 词汇与语法:(共15小题;每小题1分,满分15分)46. Much to our regret, we’ve received too many letters of ______ this month.
A. thank
B. complaint
C. introduction
D. invitation
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IV. 词汇与语法:(共15小题;每小题1分,满分15分)47. --- Do you have a computer?---Yes, I have a good________.
A. some
B. one
C. it
D. that
IV. 词汇与语法:(共15小题;每小题1分,满分15分)48. Justin ________ really shy and quiet. Now he's very outgoing.
A. use to be
B. used to be
C. use to
D. used to
IV. 词汇与语法:(共15小题;每小题1分,满分15分)49. ---I'd like to invite you to have dinner this afternoon, Mr. Smith.--- ________.
A. Oh, no. Let's not
B. I'd rather stay at home
C. I'd love to, but I have other plans
D. Oh, no. That’ll be too much trouble
IV. 词汇与语法:(共15小题;每小题1分,满分15分)50. He is seriously ill; There is ______ hope for him.
A. a few
B. few
C. little
D. a little