.--Your parents were anxious about you. You _____ home without saying a word.
-- It’s my fault.
| A．mustn’t be | B．shouldn’t have left |
| C．needn’t have left | D．couldn’t have left |
It was with great joy _______ he received the news _______ his lost son would soon return home.
| A．because; that | B．that; that |
| C．because; which | D．that; / |
_______ is no trouble that the Dallas Mavericks will defeat the Washington Wizards in the next game.
| A．It | B．As |
| C．That | D．There |
Evidence came up _______ specific speech sounds are recognized by babies as young as 6 months old.
| A．what | B．which |
| C．whose | D．that |
It’s impossible for a bee to tell the other bees _______ the food is by speaking to them,but it can _______ a little dancing.
| A．why; do | B．where; do |
| C．what; make | D．how; make |
_______ asks you to get rid of the bad habits is quite right.
| A．Who | B．Those who |
| C．Anyone whom | D．Whoever |