【C17】A．supplementaryB．spareC．auxiliaryD．extra

What gift is being offered？A．A walletB．An extra strapC．A day plannerD．A suitcase

【C19】A．supplementaryB．surplusC．additionalD．further

If employees work on public holidays, usually they will get ______.A．extra days offB．extra

You have to pay a （n ） premium for express delivery.A.extra chargeB.extra priceC.extra ti

We have ample money for the journey.A.someB.littleC.enoughD.extra

Birds are abundant in the tall vegetation.A.meagerB.extrA．C.plentifulD.steady