30. When he was only thirty years old, he had already experienced______most people only experience when they are much older.
| A．what | B．which | C．who | D．When |
______ from the top of the tower, the south foot of the mountain is a sea of trees.
| A．Seen | B．Seeing | C．Have seen | D．To see |
-- I don’t really like Jams. Why did you invite him?
--- Don’t worry. He ___ come. He said he wasn’t certain what his plans were.
| A．must not | B．need not | C．would not | D．might not |
Tom ______ in the library every night over the last three months.
| A．works | B．worked | C．has been working | D．had been working |
______ Barbara Jones offers to her fans is honesty and happiness.
| A．Which | B．What | C．That | D．Whom |
--- Is everyone here?
--- Not yet… Look, there _______ the rest of our guests!
| A．are coming | B．is coming | C． comes | D．come |