_____ the Internet is of great help, I don’t think it’s a good idea to spend too much time on it.
| A．If | B．While | C．Because | D．As |
Where and when to go for the holiday still ______.
| A．are remained to decide | B．is remaining to decide |
| C．remain to be decided | D．remains to be decided |
________ I came, the city wasn’t so beautiful.
| A．For the first time | B．At the first time |
| C．The first time when | D．The first time |
Rather than _______ on a crowded bus, he always prefers ______ a bike.
| A．ride; to ride | B．riding; ride |
| C．ride; ride | D．to ride; riding |
Tsinghua University, ______ in 1911, is home to a great number of outstanding figures.
| A．found | B．founding | C．founded | D．to be founded |
His singing career began to ______ in the late 1990s.
| A．get off | B．take off | C．put off | D．set off |