时间

time; period; hour; date; slot; point; space; duration; timing; timescale; temporal

最好

best; optimal; top; prime; ideal; optimum; first-rate; ultimate; superlative; ideally; preferably; the best; the very best; at; had better; had best; it would be best; it is as well to; would be wise to

证明

prove; demonstrate; justify; evidence; certify; attest; confirm; corroborate; substantiate; validate; bear witness; testify; bear out; proof; proving; testimony; certification; identification; certificate; testament; attestation; demonstration; verification; cert.; evidential; confirmatory; testimonial