Mother told Jim to watch the milk until it boiled and then _____ off the gas.
| A．turn | B．turning | C．turned | D．having turned |
I have been working here since I _______ this new position.
| A．offered | B．have offered | C．was offered | D．had been offered |
______ of danger in the street at night, she had to go home with a friend ____ her.
| A．Warning; following | B．Having warned; following |
| C．Warned; followed | D．Having been warned; following |
.The company ______ a survey to find out customers’ reaction to the new products.
| A．concerned | B．conducted | C．predicted | D．previewed |
Edwards's always chasing after rainbows and never ____ a really practical idea.
| A．coms up with | B．look forward to |
| C．catches up with | D．comes over to |
______ careful you are, ______ mistakes you will make.
| A．The less; the better | B．The more; the fewer |
| C．The fewer; the richer | D．The more ; the poorer |