Paper money was in___________use in China when Marco Polo visited the country in __________thirteenth century.
| A．the … / | B．the … the | C．/ … the | D．/ … / |
34. in the driving test twice, he decided it again.
| A．To fail; not to take | B．Having failed; not to take | C．On failing; not taking | D．Failing; not to take |
He is wet to the skin. He ____ in the rain.
| A．must have caught | B．must have been caught | C．must catch | D．must be caught |
. Enough attention should be paid to _____ your pronunciation and intonation.
| A．improve | B．improving | C．improved | D．be improve |
Our country is now short of natural gas oil and other forms of_______.
A energy B strength C power D material
Knowing the result of the exam, he went home and lay in bed, ______.
A upset B 
was upset C felt upset D and upset