–Did you _____ your sister when you were in Shanghai?
--No. But I _____ my uncle’s during my stay there.
| A．call on, called on | B．call at, called at |
| C．call on, called at | D．call at, called on |
I always take something to read when I go to the doctor’s ___________ I have to wait.
| A．in case | B．so that | C．in order | D．as if |
Prices of daily goods ___________ through a computer can be lower than store prices.
| A．are bought | B．bought | C．been bought | D．buying |
Courage is a kind of quality --- and that’s __________it takes to face the challenges in life.
| A．that | B．which | C．why | D．what |
Don’t be afraid of asking for help ___________ it is needed.
| A．unless | B．since | C．when | D．although |
___________ time, she will make a first-class tennis player like LiNa.
| A．Having given | B．To give | C．Giving | D．Given |