Fill in the blanks with to be (to), to have (to) or must using the correct form of the infinitive. 1. I did not know

1. I did not know who would be my travelling companion. 2. According to the state plan, many new dwelling houses will be built this year. 3. We must work hard to achieve good results. 4. I think we have to drop anchor in that bay until the storm quiets down,\" the captain said to his mate. 5. It is said your behaviour has been far from straightforward. (Sh) 6. \"Mabel has gone,\" Lanny said in a flat, impersonal voice. The old woman went back to her chair and sat down heavily. \"It must be. Where did she go, son?\" (Ab) 7. \"Have you been studying much law lately?\" I asked, to change the subject. \"Oh, Master Copperfield,\" he said with an air of self-denial; \"My reading is hardly called study.\" (CD.) 8. Sartorius. If I give in now I must give in always. (Sh.) 9. Mrs. P e a r с e. What will become of the girl? Is she paying anything? (Sh.) 10. This is serious; you must not joke) about it (Sh.)