People should think about _____ they can have a positive influence on the planet.
| A．why | B．that | C．what | D．how |
To understand the grammar of the sentence, you must break it into parts. 
| A．down | B．up | C．off | D．out |
We went to Canada to travel and my cousin ______ as our guide. 
| A．played | B．showed | C．acted | D．performed |
If you think that treating a woman well means always her permission for things, think again. 
| A．gets | B．got | C．to get, | D．getting |
Someone who lacks staying power and perseverance is unlikely to ___ a good researcher. 
| A．make | B．turn | C．get | D．grow |
Don’t respond to any e-mails ______ personal information, no matter how official they look. 
| A．searching | B．asking | C．requesting | D．questioning |