I your success although you are in difficulty now.
| A．am sure of | B．make sure | C．am sure that | D．make sure that |
The country, __with cherry tree flowers, looks as though it is now under a blanket of pink snow.
| A．covering | B．covered | C．to cover | D．covers |
Tim, drink your milk and set a good example ______ the other children!
| A．to | B．for | C．with | D．of |
Babies are interested in ______ they find and are likely to put it into their mouths.
| A．no matter what | B．no matter which | C．whatever | D．whichever |
No one believes the small dark lab is ___ home to so many great inventions at___ first sight.
| A．the; the | B．不填；the | C．the；不填 | D．不填；不填 |
Fleming discovered penicillin almost by______.
| A．experiment | B．hand | C．accident | D．theory |