His coming adds to the difficulty we ____ the problem
| A．have to solve | B．have solve | C．have solved | D．have solving |
相关试题
. The photo brought me back to the memory of t
he time in Qingdao, _______ I spent my summer holiday by the seaside with my friends.
| A．that | B．when | C．which  |
D．what |
－You can’t imagine _______ fantastic fun web chatting is.
－Really? But it may cause a lot of trouble sometimes.
| A．what | B．how | C．why | D．whether |
Parents are advised to take pressure_____a child and give him or her some encouragement before an exam.
| A．off | B．over | C．from | D．to |
Some people would rather ride bikes as bike riding has _______ of the troubles of taking buses.
| A．nothing | B．none | C．some | D．neither |
n at any time, it is _______ best to call相关知识点
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