The World Environment Day was June 5th，2021.（ ）
| A． |
fifty；on |
B． |
fiftieth；on |
C． |
fifties；in |
A table is made _____wood and paper is made ______ wood, too.
| A．from; of | B．of; from | C．of; of | D．from ; from |
_______ the weather , the swimming match has been put off.
| A．Because | B．Thanks to | C．Thanks for | D．With the help of |
I haven’t seen my old friends for years, I ‘m looking forword ______ them.
| A．to meeting | B．meet | C．to meet | D．meeting |
—Jim, have you done homework_________?
---- Yes, I have _____ done it.
| A．already; yet | B．yet; yet | C．already; already | D．yet; already |
______ some housework can make your mother_______.
| A．Doing; happy | B． Making ; happy |
| C．Doing; happily | D．Making ; happily |