——_________ abroad for 10 years, he went back home.
| A．Working | B．Having worked | C．To work | D．Worked |
26.If you want to succeed ,you must work hard and ____you should be sure of success.
| A．after all | B．above all | C．in all | D．all in all |
25. The only language ____is easy to learn is the mother tongue.
| A．which | B．whose | C．that | D．it |
24. He is the first person you can think of to rely on, for he is always willing to ___whoever is in trouble.
| A．figure out | B．make out | C．help out | D．find out |
23. While shopping, people sometimes can’t help ____into buying something they don’t really need.
| A．to persuade | B．persuading | C．being persuaded | D．be persuaded |
22.It is generally believed that teacher is ____it is a science.
| A．an art much as | B．much an art as | C．as an art much as | D．as much an art as |