Samuel Clemens, _____ Mark Twain, because a famous American writer.
| A．was known as | B．known as | C．was known for | D．known for |
----I ____ to a party, but I’ve got nothing to wear.
---- Why don’t you have a dress made for the party?
| A．was asked | B．will ask |
| C．have asked | D．have been asked |
He was born in a musical family, but he cannot play any ______.
| A．equipment | B．instrument |
| C．invention | D．instruction |
On the graduation day, he received from his father a nice present ______ a note was attached, saying “I’m proud of you.”
| A．on which | B．to which |
| C．with which | D．in which |
We should do what we can to save those _____ species, including the tiger, an animal which was considered _____ to humans.
| A．dangerous; endangered | B．dangerous; in danger |
| C．endangered; in danger | D．endangered; dangerous |
—Who______ it be that is knocking at the door?
—It ______ be Father, but I’m not sure.
A. can; mustB. can; may
. must; can D. may; must