Some intelligent and successful people find _____ difficult to succeed in language learning.
| A．them | B．it | C．themselves | D．itself |
In the USA, Columbus Day is_______ the _____ of Christopher Columbus in the New World.
| A．in the memory of; arrival | B．in memory of; arrival |
| C．in the memory of; arriving | D．in memory of; arriving |
According to the police, _______ some facts undiscovered.
| A．it seems that | B．it seems to be | C．there seem to be | D．here seem |
Recent pressure at work may________ his behavior.
A.accounts for B. pay for C. stand for D leave for
The twin towers fell down. It looked_____ a huge piece of chocolate had been melted down(溶化).
| A．as though | B．even though | C．in case | D．if |
The money is to be used________the poor.
| A．for the benefit to | B．for the benefit of |
| C．for benefit of | D．to the benefit of |