压实黏性土壤路基时，可选用的压实机械有（　　）。 A．平地机 B．光轮压路机 C．轮

Nowadays, we have tons of high-tech gadgets to help us keep connected to our friends and family. Many of us have cellphones to ___16__ calls and write text messages; the Internet to chat with friends and __17__ e-mails. But being in touch with your friends and family also means __18__ in touch with some strangers. We often get spam(网上垃圾邮件) in our inbox, calls from strangers, and messages from __19__ people. So what should we __20__ with all of these?
__21__ you might want to answer the call from an unknown number, or respond to the message from someone you don’t know, try __22__. You are not sure __23__ they are contacting you, and it could be ill-spirited. It is __24__ not to respond to calls or messages from numbers that you are not familiar __25__. The same rule applies to (应用于) e-mails. There are many people who create viruses that __26__ harm your computer, and these viruses are disguised(假装) as e-mails. __27__ opening these e-mails, you are risking getting a virus __28__ could destroy your computer.
In other words, all the new technology is great for keeping in touch, but also comes with some bad things. __29__ yourself out of trouble, it is best to __30__ from messages and calls that you don’t know.

小题1:	A．make B．do C．receive D．ring

小题2:	A．write B．send C．answer D．read

小题3:	A．to be B．being C．be D．are

小题4:	A．known B．well-known C．unknown D．better-known

小题5:	A．manage B．compare C．deal D．do

小题6:	A．But B．Since C．Because D．Although

小题7:	A．not B．not doing C．not to do D．not to

小题8:	A．that B．what C．why D．how

小题9:	A．most dangerous B．safest C．necessary D．valuable

小题10:

A．by B．with C．at D．into

小题11:

A．should B．could C．would D．need

小题12:

A．In B．By C．With D．At

小题13:

A．that B．what C．if D．whether

小题14:

A．To keep B．Keep C．Keeping D．Kept

小题15:

A．refuse B．get close C．stay away D．stop