To test eggs, _______ them in a bowl of water: if they float they’re bad, if they sink they’re good.
| A．put | B．putting |
| C．to put | D．to be putting |
It remains to be seen ________ this plan is practical enough to keep the project going.
| A．whether | B．how |
| C．where | D．when |
Helen has got ________ it takes to be a great tennis player. In other words, she has the potential to become world famous.
| A．how | B．what |
| C．when | D．that |
Israel was created as a homeland for homeless Jews after World War Ⅱ. However, the creation of Israel in ________ used to be Palestine left many Palestinians homeless.
| A．what | B．which |
| C．where | D．that |
After ________ seemed a hopeless wait, four coalminers trapped in the mine for 125 hours were finally rescued in Heilongjiang Province.
| A．when | B．that |
| C．it | D．what |
In the office an electrical engineer is looking through the instructions to know ________ the heat system works before the repair work.
| A．whether | B．why |
| C．how | D．that |