No one helped me. I did it all _____ myself.
—Should I lock the lab before I go home? —__.I'll check it myself later.
Thanks to our ___ schedule, we got our task accomplished ahead of time.
—Have you heard that he was admitted into Beijing University? —Is that true? And I'm glad that his efforts at last ___.
With the rapid development of medical science, we ___ more new drugs used in the treatment of cancer.
The teacher wants his students to know more about modern science and tries hard to develop a(n) ___ about nature among his students.