Nobody but us _____ the secret.

Not only I but also Jane and Mary      tired of having one examination after another.

Listening attentively in class and reviewing in time _______ a sure way to improve your learning, and this is especially true _______ it comes to standard tests.

Clearly, development aid together with food ______ the long-term solution to the problem of poverty.

E-mail, as well as telephone,______ an important part in daily communication.