1.Some researchers believed that there is no doubt ____a cure for AIDS will be found
A. which B. that C. what D. whether
2. Do you have any idea ____his cousin will go abroad for further study or not
A. that B. if C. whether D .why
3. Mike _____two of his shoolmates _______invited to the party
A .as well as was .B. as good as were C. and have D. as well been
