Incorrect assembly of the seal will result in leaks the valve. A: If you install the<br/>seal incorrectly, leaks can occur around the valve. B: Incorrect assembly of the seal will result in leaks past the valve. C: If you install the<br/>seal incorrectly, leaks can occur surrounding the valve.

4. In the bathroom, the toilet is cloggedand sink has a few leaks.

如果密封件安装不正确，可能会发生渗漏。 A: If you install seals incorrectly, leaks can occur through them. B: If you install seals incorrectly, leaks can pass through them. C: Incorrect assembly of seals can result in leaks past them. D: Incorrect assembly of seals can result in leaks via them.

________ the roof leaks, you have a serious problem.

Chemical leaks have had a ____effect on wildlife. (disaster)

This bath tub has a small（ ）on the side. No wonder, water leaks out of it.

________ the roof leaks, you have a serious problem. A: As a result of B: Therefore C: Whenever D: Unless

The government was plagued by leaks — a ______ of divisions and poor morale. A: synonym B: symptom C: synchronization D: syndication

____________ you are sure there are no gas leaks, don't light any matches. A: If B: When C: As D: Unless

No gas leaks or fires were reported at the site at the time of the . A: occurrence B: appearance C: beginning D: happen