六、完成句子（共5小题；每小题2分，满分10分）

56. - __________（让我惊讶的是）, that robot can drive a car.

-I've never seen such a wonderful robot, either.

57. -1 know Jack has already collected __________（成千上万的邮票）.

-Yes, he's crazy about it.

58. Lisa, pay attention to the instructions, please! This sweater __________（应该被洗）by hand in cold water.

59. -Why didn't you finish the project on time?

-I'm sorry. Searching the Internet for some information __________ （占用）the whole afternoon.

70. __________（为了提供） passengers with better service,  about 300 trains in China started free Wi-Fi service this year.