—I believe________you’ve done your best and________things will improve.

—Thank you.

A.that；/           B./；/      C.what；that    D./；that

---I believe ________ you've done your best and ________ things will improve.

---Thank you.

1. A.
   that; /
2. B.
   /; /
3. C.
   what; that
4. D.
   /; that

—I believe ________ you’ve done your best and ________ things will improve.

—Thank you.

A. that; /　　　　　　    B. /; /　　　　　　　　    C. what; that　　　　  D. /; that

—Thank you.

A. that; /　　　　　　    B. /; /　　　　　　　　    C. what; that　　　　  D. /; that

—I believe ___________ you've done your best and _________ things will improve.

—Thank you.

[    ]　　

A. that; 不填   B. 不填; 不填   C. that; that   D. 不填; that