The man was observed ________ into the house and help himself to what he liked before the owner came back．

A．slip

B．to slip

C．slipping

D．slipped

Don't be so discouraged．If you ________ such feelings, you will do better next time．

A．carry on

B．get back

C．break down

D．put away

Most electronic devices of this kind, ________ manufactured for such purpose, are tightly packed．

A．that are

B．as are

C．which is

D．it is

Once ________ a difficult and even dangerous place ________, Vietnam is now a friendly destination that welcome visitors from all over the world．

A．considered：to be visited

B．considered; to visit

C．considering; to be visited

D．considering; to visit

Running a company is not ________ a matter of hiring people---they also need to be trained．

A．simply

B．partly

C．seriously

D．equally

A gentle wind ________ through the trees．In the distance, I ________ a carriage moving slowly across the green plain．

A．Was blowing; noticed

B．blew; had notice

C．had blown, was noticing

D．has blown; have noticed

The study suggests that ________ secondhand smoke may be ________ terrible and under-recognized cause of heart attack deaths．

A．a; a

B．the; a

C．/; a

D．/; the

Bill Gates has created a wonderful “window”, ________ people can surf the Internet freely．

A．that

B．which

C．where

D．when

The traditional friendship between our two peoples ________ ancient times．

A．is dated back to

B．dates at

C．dates back to

D．is dated from

Mount Wuyi is such an attractive place of interest ________ everyone likes to visit．

A．that

B．as

C．which

D．what