Samuel Clemens, _______ as Mark Twain, was one of the most famous American writer.
| A．to know | B．to be known | C．known | D．knowing |
Mr. Hall understands that _______ math has always been easy for him, it is not easy for the students.
| A．unless | B．since | C．although | D．when |
Sally worked late in the evening to finish her report ________ her boss could read it first next morning.
| A．so that | B．because |
| C．before | D．or else |
It was an exciting moment for these football fans this year, _________ for the first time in years their team won the World Cup.
| A．that | B．while |
| C．which | D．when |
—Was his father very strict with him when he was at school？
—Yes, he had never praised him _______ he became one of the top students in his grade.
| A．after | B．unless |
| C．until | D．when |
—It’s a long time _______ I drunk so much.
—Yes, and what a pity it is since it will be a long time ______ we see each other again.
A before; since B. when; when
C. since; before D. when; then