The substance is very toxic. Protective clothing must be worn at all times.

A. When he offers me a lot to buy the painting, I won't sell it.

B. Were he to offer me much money for the painting, I wouldn't sell it.

C. Whatever price he offered me for the painting, I wouldn't sell it.

D. No matter how much he offers me for the painting, I won't sell it.

A. Theywerereluctant to announcethe news forfear that theymight worrythe public.

B. So that theywould worrythe public theywere reluctant to announcethenews.

C. Theywerereluctant to announcethe news lesttheyshould not worrythe public.

D. Theywerereluctant to announcethe news in caseof worryingthe public.

A. He hadn’t realized the importance of English until he missed the opportunity to study abroad.

B. Had he missed the opportunity to study abroad, he wouldn’t have realized the importance of English.

C. It was only after he realized the importance of English that he missed the opportunity to study abroad.

D. Not until he realized the importance of English did he miss the opportunity to study abroad.