1.Soil土壤

earthinwhichplantsgrow

Thesoilisnotveryrichinourbackyard.

Iboughtsomesoiltoputintothegarden.

2.as...as

Thistestisasdiffcultasthetestlastweek.

LondonisasexpensiveasTokyo.

3.Willing

beingreadyorhavingdesireto

Areyouwillingtojoinmetomorrow?

Ithinkheiswillingtodothejob.

4.unless

use"unless"tomean"ifnot"inthefirstconditional

Unlessyoucome,wewillnotbeabletomakeadecision.

Shewillgiveupunlessshehassomesuccesssoon.